function choseSource (choice)
{
    if (choice == 'internet')
    {
        document.getElementById ('local').disabled = true;
        document.getElementById ('local').style.display = 'none';
        document.getElementById ('internet').disabled = false;
        document.getElementById ('internet').style.display = '';
    }
    else if (choice == 'local')
    {
        document.getElementById ('local').disabled = false;
        document.getElementById ('local').style.display = '';
        document.getElementById ('internet').disabled = true;
        document.getElementById ('internet').style.display = 'none';
    }
}

function moveImages (direction, size)
{
    var down = document.getElementById ("down").value;
    var up = document.getElementById ("up").value;
    if (direction == 1 && down > 0)
    {
		for (var i = 6 - size, j = 6 - size + 1; i < 10 + size; i++, j++)
			document.getElementById ("image_" + i).src = document.getElementById ("image_" + j).src;
    }
	else if (direction == 2 && up > 0)
    {
		for (var i = 10 + size, j = 10 + size - 1; i > 6 - size; i--, j--)
			document.getElementById ("image_" + i).src = document.getElementById ("image_" + j).src;
    }
	if ((direction == 1 && down > 0) || (direction == 2 && up > 0))
	{
		direction == 1 ? down-- : down++;
		direction == 1 ? up++ : up--;
		document.getElementById ("down").value = down;
		document.getElementById ("up").value = up;
	}
}

function showType (cats, id, lang)
{
    ar = id.split (',');
    check = lang == 1 ? ar[1] : ar[0];
    for (var i = 0; i < cats.length; i++)
    {
        if (cats[i] != check)
        {
            document.getElementById (cats[i]).style.display = "none";
            document.getElementById (cats[i]).disabled = true;
        }
        else
        {
            document.getElementById (cats[i]).style.display = '';
            document.getElementById (cats[i]).disabled = false;
        }
    }
}